Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – For fault location
Patent
1994-03-02
1995-05-30
Wieder, Kenneth A.
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
For fault location
324525, 340661, G01R 3108
Patent
active
054205115
ABSTRACT:
A system for continuously monitoring electrical conduction of an AC power system comprises at least one measuring module connected between two conductors of the power system. A measuring cycle is divided into two periods. During the first period, the module measures a first DC voltage component, representative of the stray DC components, applied to its terminals. During the second period, the measuring module inputs a DC current component to the power system and measures a second DC component of the voltage applied to its terminals. The difference between the second and first components is used to detect a conduction fault, the line resistance upline from the measuring module being proportional to this difference. The first and second components are obtained by computing the mean value, weighted if necessary, of DC voltage samples measured during measuring periods of a duration lower than or equal to the first and second periods.
REFERENCES:
patent: 4400663 (1983-08-01), May
patent: 5150057 (1992-09-01), Suptitz et al.
Allin Patrice
Gaildrat Gerard
Do Diep
Gerin Merlin
Wieder Kenneth A.
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